@book{3975,
	author = {Sraffa, Piero and Rojo Duque, Luis Ángel},
	title = {Producción de mercancías por medio de mercancías},
	publisher = {Oikos-tau},
	year = {1965},
	address = {Barcelona :},
	url = {https://www.biblioeco.unsa.edu.ar/pmb/images/libros/L26737.jpg}
}